In 1721, in order to maintain the fragile peace obtained after the War of the Spanish Succession, the Regent of the Kingdom of France, Philippe d'Orléans, organized an "exchange" of royal princesses which resulted in the engagement of the King of France, Louis XV, aged 11, with Marie Anne Victoire of Spain, aged 3, and those of Crown Prince Louis, 14, with Louise-Elisabeth d'Orleans, 12 years old. But these unions appear compromised.
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